#include "../logs/bitlog.h"
#include <unistd.h>


/* 扩展一个以时间作为入职文件滚动切换类型的日志落地模块
1.以时间进行文件滚动，实际上是以时间段进行滚动
实现思想：以当前系统时间，取模时间段大小，可以得到当前时间段是第几个时间段
         每次以当前系统时间取模，判断与当前文件的时间段是否一致，不一致代表不是同一个时间段
*/

enum class TimeGap {
    GAP_SECOND,
    GAP_MINUTE,
    GAP_HOUR,
    GAP_DAY
};

class RollByTimeSink : public bitlog:: LogSink {
public:
    // 构造时传入文件名，并打开文件，将操作句柄管理起来
    RollByTimeSink(const std::string& basename, TimeGap gap_type)
        : _basename(basename) {
        switch (gap_type) {
        case TimeGap::GAP_SECOND:
            _gap_size = 1;
            break;
        case TimeGap::GAP_MINUTE:
            _gap_size = 60;
            break;
        case TimeGap::GAP_HOUR:
            _gap_size = 3600;
            break;
        case TimeGap::GAP_DAY:
            _gap_size = 3600 * 24;
            break;
        }
        _cur_gap = _gap_size == 1 ? bitlog::util::Date::now() : bitlog::util::Date::now() % _gap_size; // 获取当前是第几个时间段
        std::string filename = createNewFile();
        bitlog::util::File::createDirectory(bitlog::util::File::path(filename));
        _ofs.open(filename, std::ios::binary | std::ios::app);
        assert(_ofs.is_open());
    }

    // 将日志消息写入到指定滚动文件，判断当前时间是否是当前文件的时间段，不是则切换文件
    void log(const char* data, size_t len) override {
        time_t cur = bitlog::util::Date::now();
        if (cur % _gap_size != _cur_gap) {
            _ofs.close();
            std::string filename = createNewFile();
            bitlog::util::File::createDirectory(bitlog::util::File::path(filename));
            _ofs.open(filename, std::ios::binary | std::ios::app);
            assert(_ofs.is_open());
        }
        _ofs.write(data, len);
        assert(_ofs.good());
    }

private:
    std::string createNewFile() {
        time_t t = bitlog::util::Date::now();
        struct tm lt;
        localtime_r(&t, &lt);
        std::stringstream filename;
        filename << _basename;
        filename << lt.tm_year + 1900;
        filename << lt.tm_mon + 1;
        filename << lt.tm_mday;
        filename << lt.tm_hour;
        filename << lt.tm_min;
        filename << lt.tm_sec;
        filename << ".log";
        return filename.str();
    }

private:
    std::string _basename;
    std::ofstream _ofs;
    size_t _cur_gap;  // 当前时间段次序
    size_t _gap_size; // 时间段大小
};

int main() {
    // 创建一个LoggerBuilder的智能指针，用于构建日志对象
    std::unique_ptr<bitlog::LoggerBuilder> builder(new bitlog::GlobalLoggerBuilder);
    builder->buildLoggerName("async_logger");// 设置日志对象的名称为"async_logger"
    builder->buildLoggerLevel(bitlog::LogLevel::value::DEBUG);// 设置日志对象的日志级别为DEBUG
    builder->buildFormatter("[%d{%H:%M:%S}][%t][%p][%c][%f:%l]%T%m%n");// 设置日志对象的日志格式
    builder->buildLoggerType(bitlog::LoggerType::LOGGER_ASYNC);// 设置日志对象的类型为同步日志
    builder->buildSink<RollByTimeSink>("./logfile/roll-async-by-time", TimeGap::GAP_SECOND);
    bitlog::Logger::ptr logger = builder->build();
    size_t cur = bitlog::util::Date::now();
    while (bitlog::util::Date::now() < cur + 5) {
        logger->fatal("这是一条测试日志");
        usleep(1000);
    }

    return 0;
}

